A. the theB. C. theD. the The police have （）power to de……

单项选择题Listen! His family must be quarrelling, （）

A. mustn't it
B. isn't it
C. aren't they
D. needn't they

单项选择题That she hadn't kept her（）on her work resulted in the failure.

A. head
B. heart
C. brain
D. mind

单项选择题科学知识再生产的主要途径是( )。

单项选择题主张把课程的重点放在现实社会问题及学生关心的社会问题上的理论是( )。

单项选择题衡量各科教学质量的重要标准是( )。